from a range address trying to make all SbxVariables reference count their parents is ludiciously hard, so just reference count this one known crashing case Change-Id: Ie1fa6624e8184146dd00d766cdbacef674153ef6 Reviewed-on: https://gerrit.libreoffice.org/26272 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Caolán McNamara <caolanm@redhat.com> Tested-by: Caolán McNamara <caolanm@redhat.com>